Checking navweaps.com for a moment...
British ASW weapons:
Type D Mark III: 2.1 meters per second (this type rare by WWII)
Mark VII: 3.0 meters per second (both airborne and ship variants)
Mark VII Heavy: 5.1 meters per second
Mark X: 1.8 meters per second (this type had a 2,000 pound charge)
Mark X*: 6.1 meters per second
Hedgehog: 6.7 to 7.2 meters per second
Squid: 13.3 meters per second
American depth charges:
Mark 6: 2.4 meters per second
Mark 7: 2.7 meters per second (later models with reduced charge and lead weight 4.0 meters per second)
Mark 8: 3.5 meters per second
Mark 9: 6.9 meters per second
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